From Birkenstock, the Women's Zermatt Herringbone Shearling-Lined Slippers feature: Soft genuine wool felt upper Slip-on design Genuine shearling (New Zealand) lining for comfort & warmth Contoured cork footbed supports the arches of the foot Deep heel cup for all-day comfort; flat heel  Dipped rubber outsole for traction Imported. Styling Notes: Birkenstock footwear is made in European whole sizes. The style selected is a Birkenstock narrow footbed that will fit most medium feet.